What is the reference angle for $140^\circ$ ?

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Answer 1 · 2018-04-18T09:11:57

$color(maroon)("Ref. angle " A_r = 180 - 140 = 40^@$

Since the angle 140° is in the second quadrant,

the reference angle formula is Ar=180°−Ac.

A r = 180 ° - 140 = 40°.

What is the reference angle for 140^\circ140^\circ?